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http://dx.doi.org/10.4491/KSEE.2012.34.4.239

Removal Characteristics of Heavy Metals in Acid Wastewater by Ceramics Using Natural Zeolite and Converter Slag  

Kim, Dong-Hee (Department of Environmental Engineering, Kyungsung University)
Yim, Soo-Bin (Department of Environmental Engineering, Kyungsung University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.34, no.4, 2012 , pp. 239-246 More about this Journal
Abstract
This study was performed to investigate the removal characteristics and mechanism of heavy metals using pellet-type ceramics(ZS ceramics), in which natural zeolite was mixed and calcined with converter slag. The optimal calcination temperature range was measured to be $600{\sim}800^{\circ}C$. The calcination time had little effect on the removal of heavy metal in acid wastewater. The adequate dose of ceramics was shown to be 2~5% for removal of heavy metals in acid wastewater. The maximum removal capacity of ZS ceramics for heavy metals were observed to be Al 84.7 mg/g, Cd 37.3 mg/g, Cr 81.7 mg/g, Cu 55.6 mg/g, Fe 57.2 mg/g, Mn 32.1 mg/g, Ni 38.0 mg/g, Pb 71.6 mg/g, Zn 46.3 mg/g. The pH played a pivotal role in the removal of heavy metals by ZS ceramics. The analysis results of mechanism exhibited that the ZS ceramics could act as a multi-functional ceramics for removal of heavy metals in acid wastewater by adsorption, ion-exchange, or precipitation.
Keywords
Natural Zeolite; Converter Slag; Heavy Metal; Adsorption; Precipitation;
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